I have a G4 MDD (Apple processor) with OS X 10.5 and use it for internet. In December, 2013, I purchased a new Mac-mini (Intel) with Mavericks 10.9 and want to use this for everything. But problems arise. The Mac-mini will not accept my HP Printer: it does not support Power PC systems. I rarely print anything, the printer works fine with the G4, and dont want to buy a new one just for the Mac-mini. I am interested for an AT&T offer for a DSL internet hook-up, but their Mac requirements go from 9.2 to OS X 10.6. I still have the Leopard 10.5. disk. What if I installed the OS X 10.5 on the Mac-mini? Would that solve my problem? Would the printer and internet automatically open the 10.5 instead of the 10.9?